655761601 has 8 divisors (see below), whose sum is σ = 740044800. Its totient is φ = 575589840.

The previous prime is 655761599. The next prime is 655761607. The reversal of 655761601 is 106167556.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 655761601 - 2¹ = 655761599 is a prime.

It is not an unprimeable number, because it can be changed into a prime (655761607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1027521 + ... + 1028158.

It is an arithmetic number, because the mean of its divisors is an integer number (92505600).

Almost surely, 2^655761601 is an apocalyptic number.

It is an amenable number.

655761601 is a deficient number, since it is larger than the sum of its proper divisors (84283199).

655761601 is a wasteful number, since it uses less digits than its factorization.

655761601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2055719.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 655761601 is about 25607.8425682446. The cubic root of 655761601 is about 868.7910282989.

The spelling of 655761601 in words is "six hundred fifty-five million, seven hundred sixty-one thousand, six hundred one".